13 Weeks Pregnant

13 Weeks size comparison

Baby this Week

  • Organs begin to function.
  • The pancreas is producing insulin and the kidneys are producing urine.

How Big is Baby?

Baby is 2.91 inches long (7.4 cm)
(Measured from crown to rump)
Baby weighs 0.81oz (23 grams)
*Metrics above are estimates of baby at 13 weeks

Images of Baby at 13 Weeks

13 Weeks pregnant illustration
13 Week old baby in womb

Your Developments

  • 2.3 - 3.5 lb (1 to 1.5kg) weight gain over the past month. On average 10 1/2 oz (300 gms) a week.
  • Possible increase in perspiration.
  • Gum problems may result from an increase in blood flow.

Pregnancy To Do's

  • Visit your dentist now as chances for dental problems increase during pregnancy.
  • Remember to tell your dentist you are pregnant.


Disclaimer: All information featured on weeksduringpregnancy.com should be used for educational purposes only and is not intended to replace medical advice.
Consult your doctor, physician or midwife regarding any personal pregnancy issues or medical conditions.